<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>欢迎使用</h1>
    <h2>引入CSS之类的看P39</h2>
    <div>{{ n1 }}</div>
    <div>{{ n2.1 }}</div>
    <!-- 展示n2!-->
    <div>
        {%  for item in n2%}
            <span>{{ item }}</span>
        {% endfor %}
    </div>
    </div>
<img src="/static/img/1.png" alt="">
</body>
</html>